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GM-M5 16" 5.56mm AR Barrel w/Ext. 1:7 twist

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Product Description

5.56mm,1:7 twist,16",  41V50 milspec, weighs 1.85 lbs, fully machined with extension (with m4 feed ramps). Chrome line bore and chamber. Carbine length gas block, .750" gas block, drilled gas port hole, muzzle threaded 1/2x28, Phosphated finish,. Barrel has been button rifled, air gauged, and stress relieved.

Barrel is not pinned for front sight.

Under "See 1 more picture" there is a detailed drawing of this barrel.

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Product Reviews

Showing reviews 1-5 of 20 | Next

  1. 16" 5.56 chrome lined barrel 5 Star Review

    Posted by on 23rd Apr 2018

    Great Product, awesome value

  2. excellent value 5 Star Review

    Posted by on 10th Apr 2018

    Best group to date with this barrel 1.375" at 100 yards with fed xm855. ( free floated, standard mil trigger, standard a2 muzzle, 4x optic. ) I consider this very good performance for a pretty standard setup.

    I am confident that this barrel is capable of grouping well under an inch at 100yrds with a better ammunition selection/trigger upgrade.

  3. Good Barrel 5 Star Review

    Posted by on 16th Oct 2017

    Recently completed a custom build with a SOTA lower and handloaded 69 gr 5.56 Good barrel and is a tack driver. Very pleased with Green Mtn.

  4. Green Mountain Does it Again! 5 Star Review

    Posted by on 7th Nov 2016

    Service, delivery and value is what keeps me coming back to Green Mountain.

    I just completed a billet Ar-15 build and spared no expense on what components I wanted. When it came down to one of the most important features the barrel, I knew there was only one choice Green Mountain.

    Rifle shoots straight / true through to the fit / finish which is top notch. The letter showcasing their pride towards servicing their customers, shows a certain level of class.

  5. Range Report 5 Star Review

    Posted by on 1st May 2016

    This is the second barrel I've bought from here. Fit and finish was outstanding as usual. Install was simple and interfaced perfectly with an Aero Precision upper and a YHM Diamond FF.

    The accuracy of this barrel was mind blowing for the price. Grouping was done at 25m. M855 produced groups that were tight enough that you could just barely see the individual holes. I then ran some Berger 55gr hand loads. Those repeatably produced groups that looked like single ragged holes.

Showing reviews 1-5 of 20 | Next